Messages in this thread Patch in this message | | | From | John Stultz <> | Subject | [PATCH 2/2] RTC: Properly handle rtc_read_alarm error propagation and fix bug | Date | Thu, 20 Jan 2011 15:26:13 -0800 |
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In reviewing cases where the virtualized interfaces didn't propagate errors properly, I noticed rtc_read_alarm needed fixing. In doing so I noticed my RTC rework dropped a memset and that the behavior of rtc_read_alarm shouldn't be conditionalized on the alarm.enabled flag (as the alarm may be set, but the irqs may be disabled). So those were corrected as well.
CC: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/rtc/interface.c | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index f1ba2c6..925006d 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -123,12 +123,18 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) err = mutex_lock_interruptible(&rtc->ops_lock); if (err) return err; - alarm->enabled = rtc->aie_timer.enabled; - if (alarm->enabled) + if (rtc->ops == NULL) + err = -ENODEV; + else if (!rtc->ops->read_alarm) + err = -EINVAL; + else { + memset(alarm, 0, sizeof(struct rtc_wkalrm)); + alarm->enabled = rtc->aie_timer.enabled; alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires); + } mutex_unlock(&rtc->ops_lock); - return 0; + return err; } EXPORT_SYMBOL_GPL(rtc_read_alarm); -- 1.7.3.2.146.gca209
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